Abstract: Height, breadth and diameter of corolla are the important ornamental characters of petunia. The uniformity of three characteristic of the new variety “0210”are analysed by the ways of coefficient of variation and new multiple range test. The uniformity of three characteristic of the new variety “0210”and the variety “Dream” which is the most popular variety of petunia in the world are compared. The result indicated that The variability of breadth of the new variety “0210” is less than the purple, pink, white of “Dream”; The variability of height of the new variety “0210” is less than the purple of “Dream”, but more than the pink, white of the “Dream”. the difference of height is remarkable between the new variety “0210” and the pink and white of “Dream” ,the height of the new variety “0210”is close to the purple “Dream”; the diameter of corolla of new variety “0210” is 8.22cm, is more than the other variety “Dream”. but The variability of diameter of corolla is more than the “Dream”. Big flowers percentage of the “0210”is higher than the rose of the “Dream”.